NL167356C - Werkwijze ter vervaardiging van thermoplastische voor- werpen door blaasvormen. - Google Patents
Werkwijze ter vervaardiging van thermoplastische voor- werpen door blaasvormen.Info
- Publication number
- NL167356C NL167356C NL7400269.A NL7400269A NL167356C NL 167356 C NL167356 C NL 167356C NL 7400269 A NL7400269 A NL 7400269A NL 167356 C NL167356 C NL 167356C
- Authority
- NL
- Netherlands
- Prior art keywords
- bladdering
- thermoplastic articles
- manufacturing thermoplastic
- manufacturing
- articles
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/46—Component parts, details or accessories; Auxiliary operations characterised by using particular environment or blow fluids other than air
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/16—Cooling
- B29C2035/1658—Cooling using gas
- B29C2035/1675—Cooling using gas other than air
- B29C2035/1683—Cooling using gas other than air inert gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/46—Component parts, details or accessories; Auxiliary operations characterised by using particular environment or blow fluids other than air
- B29C2049/4602—Blowing fluids
- B29C2049/4605—Blowing fluids containing an inert gas, e.g. helium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/46—Component parts, details or accessories; Auxiliary operations characterised by using particular environment or blow fluids other than air
- B29C2049/4602—Blowing fluids
- B29C2049/4605—Blowing fluids containing an inert gas, e.g. helium
- B29C2049/4608—Nitrogen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/46—Component parts, details or accessories; Auxiliary operations characterised by using particular environment or blow fluids other than air
- B29C2049/4602—Blowing fluids
- B29C2049/4611—Blowing fluids containing a reactive gas
- B29C2049/4614—Chlorine
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/46—Component parts, details or accessories; Auxiliary operations characterised by using particular environment or blow fluids other than air
- B29C2049/4602—Blowing fluids
- B29C2049/4611—Blowing fluids containing a reactive gas
- B29C2049/4617—Fluor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/46—Component parts, details or accessories; Auxiliary operations characterised by using particular environment or blow fluids other than air
- B29C2049/4602—Blowing fluids
- B29C2049/4611—Blowing fluids containing a reactive gas
- B29C2049/462—Oxygen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/46—Component parts, details or accessories; Auxiliary operations characterised by using particular environment or blow fluids other than air
- B29C2049/4602—Blowing fluids
- B29C2049/4611—Blowing fluids containing a reactive gas
- B29C2049/4623—Blowing fluids containing a reactive gas the gas containing sulfur, e.g. sulfur trioxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US358985A US3862284A (en) | 1973-05-10 | 1973-05-10 | Process for producing blow molded thermoplastic articles having improved barrier properties |
Publications (2)
Publication Number | Publication Date |
---|---|
NL7400269A NL7400269A (nl) | 1974-11-12 |
NL167356C true NL167356C (nl) | 1981-12-16 |
Family
ID=23411842
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL7400269.A NL167356C (nl) | 1973-05-10 | 1974-01-08 | Werkwijze ter vervaardiging van thermoplastische voor- werpen door blaasvormen. |
Country Status (10)
Country | Link |
---|---|
US (1) | US3862284A (nl) |
JP (1) | JPS5315862B2 (nl) |
CA (1) | CA1028113A (nl) |
DE (1) | DE2401948C3 (nl) |
FR (1) | FR2229531B1 (nl) |
GB (1) | GB1409507A (nl) |
IT (1) | IT1003337B (nl) |
NL (1) | NL167356C (nl) |
SE (1) | SE397491B (nl) |
ZA (1) | ZA738834B (nl) |
Families Citing this family (73)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3992221A (en) * | 1975-10-23 | 1976-11-16 | Vitek, Inc. | Method of treating extensible hydrocarbon articles |
US4153659A (en) * | 1977-08-01 | 1979-05-08 | Air Products And Chemicals, Inc. | Enhancing solvent barrier property of pigmented polymeric bodies |
US4142032A (en) * | 1977-12-29 | 1979-02-27 | Union Carbide Corporation | Process for improving barrier properties of polymers |
CA1121956A (en) * | 1978-06-28 | 1982-04-20 | Arden R. Weatherly | Blow molding of plastic articles having barrier properties |
US4237156A (en) * | 1978-11-17 | 1980-12-02 | Phillips Petroleum Company | Fluorinated poly(arylene sulfides) |
US4396567A (en) * | 1979-11-27 | 1983-08-02 | Dewey Rainville | Method for blow molding with active ingredient in blowing gas |
US4336015A (en) * | 1979-11-27 | 1982-06-22 | Rainville Dewey N | Apparatus for blow molding with active ingredient in blowing gas |
DE3009412C2 (de) * | 1980-03-12 | 1986-11-06 | Daimler-Benz Ag, 7000 Stuttgart | Kraftstofftank für Kraftfahrzeuge und Verfahren zu seiner Herstellung |
JPS5850572B2 (ja) * | 1980-05-09 | 1983-11-11 | 大同酸素株式会社 | ブロ−ガス回収を伴う中空成形品の製造方法 |
US4391128A (en) * | 1981-04-20 | 1983-07-05 | Air Products And Chemicals, Inc. | Back-diffusion quality control method for barrier treated containers |
CA1181208A (en) * | 1981-04-20 | 1985-01-22 | Joseph Barbanel | Process and apparatus for producing blow molded thermoplastic articles having improved weld strength |
US4422991A (en) * | 1982-02-22 | 1983-12-27 | Dayco Corporation | Method of making hose construction |
DE3245915C2 (de) | 1982-12-11 | 1986-07-17 | Hewing GmbH & Co, 4434 Ochtrup | Verfahren zur Fluorierung einer Oberflächenschicht von Formkörpern aus Kunststoff |
US4659674A (en) * | 1983-09-28 | 1987-04-21 | Air Products And Chemicals, Inc. | Quality control method for containers |
US4552847A (en) * | 1983-09-28 | 1985-11-12 | Air Products And Chemicals, Inc. | Visual quality control method for barrier treated containers |
DE3415381C2 (de) * | 1984-04-25 | 1996-06-13 | Kali Chemie Ag | Verfahren zur Reibungsminderung von Polymeroberflächen |
US4699585A (en) * | 1984-09-28 | 1987-10-13 | Kautex-Werke Reinold Hagen Ag | Blow molding apparatus |
DE3435592A1 (de) * | 1984-09-28 | 1986-04-03 | Kautex Werke Reinold Hagen AG, 5300 Bonn | Verfahren zur herstellung von hohlkoerpern aus thermoplastischem kunststoff |
FR2570964B1 (fr) * | 1984-10-03 | 1988-11-10 | Air Liquide | Procede et appareil d'impermeabilisation d'une surface constituee d'un polymere. |
US4743419A (en) * | 1985-03-04 | 1988-05-10 | The Dow Chemical Company | On-line film fluorination method |
US4754138A (en) * | 1985-06-17 | 1988-06-28 | Harold Edelstein | Scintillation apparatus and method with surface-modified polyethylene sample vessels |
DE3523137C1 (de) * | 1985-06-28 | 1986-04-30 | Audi AG, 8070 Ingolstadt | Verfahren zum Aufblasen und Fluorieren eines Kunststofftanks |
DE3529870A1 (de) * | 1985-08-21 | 1987-02-26 | Basf Ag | Verfahren zur verringerung der permeation von blasgeformten hohlkoerpern aus thermoplastischen kunststoffen |
EP0266439A1 (de) * | 1986-11-01 | 1988-05-11 | PVI Patent-Verwertungs- und Innovations-Gesellschaft mbH | Verfahren zur Herstellung von Hohlkörpern mit Innenfluorierung |
DE3535602A1 (de) * | 1985-10-05 | 1987-04-09 | Hewing Gmbh & Co | Verfahren zur herstellung von an der innenoberflaeche fluorierten hohlkoerpern aus thermoplastischen kunststoffen durch blasformen |
US4771110A (en) * | 1986-02-04 | 1988-09-13 | Air Products And Chemicals, Inc. | Polymeric materials having controlled physical properties and processes for obtaining these |
US4833205A (en) * | 1986-02-04 | 1989-05-23 | Air Products And Chemicals, Inc. | Polymeric materials having controlled physical properties |
AU7588587A (en) * | 1986-07-16 | 1988-02-10 | Richard Friedrich | Container with at least one chamber formed by a tubular body, tubular body, process and device for producing the same |
US4828585A (en) * | 1986-08-01 | 1989-05-09 | The Dow Chemical Company | Surface modified gas separation membranes |
US4782134A (en) * | 1986-10-20 | 1988-11-01 | The Dow Chemical Company | Method for improving the melt flow rate of polystyrene |
DE3640975C2 (de) * | 1986-12-01 | 1994-08-11 | Messer Griesheim Gmbh | Verfahren zur Herstellung fluorierter Oberflächen von Polyethylen hoher Dichte (HDPE) |
US4752428A (en) * | 1987-01-28 | 1988-06-21 | Air Products And Chemicals, Inc. | Injection molding process with reactive gas treatment |
US4800053A (en) * | 1987-01-28 | 1989-01-24 | Air Products And Chemicals, Inc. | Injection molding process with reactive gas treatment |
DE3712809A1 (de) * | 1987-04-15 | 1988-11-03 | Linde Ag | Verfahren zur herstellung von hohlprofilen aus kunststoff |
AU590081B2 (en) * | 1987-05-20 | 1989-10-26 | Air Products And Chemicals Inc. | Polymeric materials having controlled physical properties and process for obtaining these |
US4764405A (en) * | 1987-07-22 | 1988-08-16 | Air Products And Chemicals, Inc. | Method for increasing barrier properties of thermoplastic substrates |
US4880675A (en) * | 1988-04-25 | 1989-11-14 | Air Products And Chemicals, Inc. | Hot-fillable plastic containers |
US4994308A (en) * | 1988-05-31 | 1991-02-19 | Tarancon Corporation | Direct fluorination of polymeric materials by using dioxifluorine fluid (mixture of CO2 and F2) |
US5073175A (en) * | 1988-08-09 | 1991-12-17 | Air Products And Chemicals, Inc. | Fluorooxidized polymeric membranes for gas separation and process for preparing them |
US5030399A (en) * | 1988-08-29 | 1991-07-09 | The Dow Chemical Company | Method of in-mold sulfonation of molded plastic article |
US4861250A (en) * | 1988-08-29 | 1989-08-29 | The Dow Chemical Company | Mold sulfonation system |
US5019208A (en) * | 1990-03-23 | 1991-05-28 | Air Products And Chemicals, Inc. | Method for determining the depth of permeation of a modifier into the interior of a thermoplastic article |
DE4040316C2 (de) * | 1990-09-08 | 1994-11-24 | Hewing Gmbh | Verfahren zur keimwachstumshemmenden Behandlung von Oberflächen von technischen Gegenständen und Hohlkörper zur Begrenzung flüssiger oder gasförmiger Medien |
US5156783A (en) * | 1991-01-18 | 1992-10-20 | Solvay Automotive, Inc. | Two stage process for sulfonating plastic containers |
US5202161A (en) * | 1991-01-18 | 1993-04-13 | Solvay Automotive, Inc. | High sulfur level plastic container sulfonation process and article produced thereby |
BE1004647A3 (fr) * | 1991-02-20 | 1993-01-05 | Solvay | Procede pour realiser, par moulage par soufflage, des corps creux en matiere thermoplastique presentant une impermeabilite aux gaz amelioree. |
DE4212969A1 (de) * | 1992-04-18 | 1993-10-21 | Messer Griesheim Gmbh | Verfahren zur Herstellung von Barriereschichten für Abmischungen aus polaren und unpolaren Stoffen auf der inneren Oberfläche von Hohlkörpern aus thermoplastischen Kunststoffen |
US5244615A (en) * | 1992-12-03 | 1993-09-14 | Air Products And Chemicals, Inc. | Process for the production of permeation resistant containers |
DE4310641C1 (de) * | 1993-04-01 | 1994-01-13 | Basf Ag | Verwendung von stabilisatorfreiem Polyethylen hoher Dichte (PE-HD) zur Herstellung von Hohlkörpern |
US5849818A (en) * | 1993-06-03 | 1998-12-15 | Walles; Wilhelm E. | Skin sulfonated particles in matrices |
DE4343003C2 (de) * | 1993-12-16 | 1997-03-13 | Kautex Werke Gmbh | Verfahren zum Herstellen von Hohkörpern aus thermoplastichem Kunststoff sowie Hohlkörper aus thermoplastischem Kunststoff |
US5792528A (en) * | 1994-06-17 | 1998-08-11 | Atomic Energy Corporation Of South Africa Limited | Process for the production of plastic components for containing and/or transporting fluids |
US5900321A (en) * | 1994-06-17 | 1999-05-04 | Pelindaba District Brits Atomic Energy Corp. Of South Africa Limited | Method for the production of composites |
US5508330A (en) * | 1994-11-03 | 1996-04-16 | Ciba-Geigy Corporation | Barrier property enhancement of films and molded articles |
DE19505188A1 (de) * | 1995-02-16 | 1996-08-22 | Basf Ag | Mehrschichtiger, fluorhaltiger polymerer Stoff |
US5770135A (en) * | 1996-07-01 | 1998-06-23 | Air Products And Chemicals, Inc. | Process for producing permeation resistant containers |
CN1325419A (zh) * | 1998-10-29 | 2001-12-05 | 科乐医药有限公司 | 1,1-二取代单体组合物用的聚合物容器 |
DE19941544A1 (de) * | 1999-09-01 | 2001-03-08 | Messer Griesheim Gmbh | Reagenz für die Fluorierung von Kunststoffen |
CA2324977A1 (en) | 2000-11-02 | 2002-05-02 | Chinese Petroleum Corp. | High gasoline permeation resistant plastic container |
US20040056390A1 (en) * | 2000-11-27 | 2004-03-25 | Jean-Taut Yeh | High gasoline permeation resistant plastic container |
US6896838B2 (en) * | 2001-11-21 | 2005-05-24 | Closure Medical Corporation | Halogenated polymeric containers for 1, 1-disubstituted monomer compositions |
AU2003289228A1 (en) | 2002-12-10 | 2004-06-30 | Toyo Boseki Kabushiki Kaisha | Material for fuel-system part and fuel-system part comprising the same |
US20050005956A1 (en) * | 2003-07-11 | 2005-01-13 | Maytag Corporation | Fluorine gas treatment of washing machine parts |
PL1609815T3 (pl) | 2004-06-21 | 2009-02-27 | Air Prod & Chem | Sposób zmniejszania przepuszczalności materiałów z tworzyw sztucznych |
EP1614709A1 (en) * | 2004-06-21 | 2006-01-11 | Air Products And Chemicals, Inc. | Process for reducing the permeability of plastics materials |
JP2008508392A (ja) * | 2004-12-07 | 2008-03-21 | エルジー・ケム・リミテッド | 高遮断性物品 |
US20090148348A1 (en) * | 2005-08-11 | 2009-06-11 | Eksigent Technologies, Llc | Plastic surfaces and apparatuses for reduced adsorption of solutes and methods of preparing the same |
DE102006012367B4 (de) * | 2006-03-17 | 2015-07-16 | Air Liquide Deutschland Gmbh | Verfahren zur Herstellung eines Hohlkörpers aus Kunststoff mit innenseitiger Sperrschicht |
US20130020507A1 (en) * | 2010-06-17 | 2013-01-24 | Life Technologies Corporation | Methods for Detecting Defects in Inorganic-Coated Polymer Surfaces |
US20090277532A1 (en) * | 2008-05-09 | 2009-11-12 | Chata Biosystems, Inc. | Vessel for reduction of extractable material into contained fluent substances |
EP2440585B1 (en) * | 2009-06-08 | 2013-10-09 | Basell Polyolefine GmbH | Method to improve the barrier properties of ethylene polymer against permeation of hydrocarbons and plastic fuel tank having improved barrier properties |
DE102014004354A1 (de) * | 2014-03-27 | 2015-10-01 | Khs Corpoplast Gmbh | Verfahren und Vorrichtung zum Herstellen eines mit Füllgut gefüllten Behälters |
FR3038252B1 (fr) * | 2015-06-30 | 2019-11-01 | Ipackchem Group | Recipient multicouche en matiere plastique. |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2829070A (en) * | 1955-04-27 | 1958-04-01 | Du Pont | Treatment of synthetic linear polyester structures and product |
US2811468A (en) * | 1956-06-28 | 1957-10-29 | Shulton Inc | Impermeable polyethylene film and containers and process of making same |
US3184358A (en) * | 1961-06-20 | 1965-05-18 | Multifol Patentverwert Ag | Method of forming laminated plastic tubing |
FR1405298A (fr) * | 1964-05-25 | 1965-07-09 | Procédé de fabrication d'objets creux en matières thermoplastiques | |
IL31483A (en) * | 1968-02-02 | 1972-02-29 | British Resin Prod Ltd | Plastics containers for fuel storage |
-
1973
- 1973-05-10 US US358985A patent/US3862284A/en not_active Expired - Lifetime
- 1973-11-15 CA CA185,858A patent/CA1028113A/en not_active Expired
- 1973-11-19 SE SE7315603A patent/SE397491B/xx unknown
- 1973-11-20 ZA ZA738834A patent/ZA738834B/xx unknown
- 1973-11-20 GB GB5375073A patent/GB1409507A/en not_active Expired
-
1974
- 1974-01-04 IT IT19130/74A patent/IT1003337B/it active
- 1974-01-08 NL NL7400269.A patent/NL167356C/nl not_active IP Right Cessation
- 1974-01-16 DE DE2401948A patent/DE2401948C3/de not_active Expired
- 1974-01-24 FR FR7402371A patent/FR2229531B1/fr not_active Expired
- 1974-05-09 JP JP5169974A patent/JPS5315862B2/ja not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB1409507A (en) | 1975-10-08 |
FR2229531A1 (nl) | 1974-12-13 |
SE397491B (sv) | 1977-11-07 |
DE2401948C3 (de) | 1979-03-29 |
FR2229531B1 (nl) | 1977-06-10 |
IT1003337B (it) | 1976-06-10 |
JPS5015852A (nl) | 1975-02-19 |
DE2401948B2 (de) | 1977-10-06 |
DE2401948A1 (de) | 1974-11-28 |
US3862284A (en) | 1975-01-21 |
CA1028113A (en) | 1978-03-21 |
ZA738834B (en) | 1974-10-30 |
JPS5315862B2 (nl) | 1978-05-27 |
NL7400269A (nl) | 1974-11-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
BC | A request for examination has been filed | ||
V4 | Lapsed because of reaching the maximum lifetime of a patent |